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Kyutacarは九州工業大学で生産された研究成果を オープンアクセスで提供する機関リポジトリシステムです。 Kyutacar is open-access repository of research by members of the Kyushu Institute of Technology.
Department of Engineering Science, Faculty of Informatics and Engineering, The University of Electro-Communications
Graduate School of Life Science and Systems Engineering, Kyushu Institute of Technology
Fonctions Optiques pour les Technologies de l'information
Graduate School of Life Science and Systems Engineering, Kyushu Institute of Technology
Graduate School of Life Science and Systems Engineering, Kyushu Institute of Technology
Department of Engineering Science, Faculty of Informatics and Engineering, The University of Electro-Communications
Department of Engineering Science, Faculty of Informatics and Engineering, The University of Electro-Communications
Department of Engineering Science, Faculty of Informatics and Engineering, The University of Electro-Communications
Department of Engineering Science, Faculty of Informatics and Engineering, The University of Electro-Communications
Department of Engineering Science, Faculty of Informatics and Engineering, The University of Electro-Communications
Department of Engineering Science, Faculty of Informatics and Engineering, The University of Electro-Communications
Department of Electrical and Electronic Engineering, Miyazaki University
Department of Electrical and Electronic Engineering, Faculty of Science and Engineering, Ritsumeikan University
Department of Applied Chemistry, Faculty of Science and Engineering, Chuo University
Graduate School of Life Science and Systems Engineering, Kyushu Institute of Technology
抄録
Lead halide perovskites are attracting a great deal of interest for optoelectronic applications such as solar cells, LEDs, and lasers because of their unique properties. In solar cells, heat dissipation by hot carriers results in a major energy loss channel responsible for the Shockley–Queisser efficiency limit. Hot carrier solar cells offer the possibility to overcome this limit and achieve energy conversion efficiency as high as 66% by extracting hot carriers. Therefore, fundamental studies on hot carrier relaxation dynamics in lead halide perovskites are important. Here, we elucidated the hot carrier cooling dynamics in all-inorganic cesium lead iodide (CsPbI3) perovskite using transient absorption spectroscopy. We observe that the hot carrier cooling rate in CsPbI3 decreases as the fluence of the pump light increases and the cooling is as slow as a few 10 ps when the photoexcited carrier density is 7 × 1018 cm−3, which is attributed to phonon bottleneck for high photoexcited carrier densities. Our findings suggest that CsPbI3 has a potential for hot carrier solar cell applications.
雑誌名
Applied Physics Letters
巻
111
号
15
ページ
153903-1 - 153903-5
発行年
2017-10-09
出版者
American Institute of Physics
ISSN
0003-6951
1077-3118
書誌レコードID
AA00543431
DOI
info:doi/10.1063/1.4991993
権利
The following article has been submitted accepted by Applied Physics Letters. After it is published, it will be found at https://doi.org/10.1063/1.4991993.
Slow hot carrier cooling in cesium lead iodide perovskites
APL111_153903.pdf
(1.37MB)
